microbial leaching of uranium ore

Enhanced uranium bioleaching highfluorine and lowsulfur

The results of column and heap bioleaching showed that 89.25% and 90.40% of uranium were recovered with the consortium and pyrite addition, which increased the uranium leaching rates by 13.22% and 8.96% as compared with the sulfuric acid leaching.

Enhanced uranium bioleaching highfluorine and lowsulfur

The results of column and heap bioleaching showed that 89.25% and 90.40% of uranium were recovered with the consortium and pyrite addition, which increased the uranium leaching rates by 13.22% and 8.96% as compared with the sulfuric acid leaching.

8 Microbial Leaching of Metals WileyVCH

4 Principles of Microbial Metal Leaching 194 4.1 Leaching Mechanisms 194 4.2 Models of Leaching Mechanisms 194 4.3 Factors Influencing Bioleaching 197 4.4 Bacterial Attachment on Mineral Surfaces 200 5 Microbial Diversity in Bioleaching Environments 200 6 Case Studies of Bioleaching Appliions 208 6.1 CommercialScale Copper Ore Bioleaching 208

Uranium leaching is an indirect process When T.ferrooxidants are involved in uranium extraction, they do not directly attack on ore but on the iron oxidants. The pyrite reaction is used for the initial production of Fe Reaction 2FeS+H2O+7 ½[O2] Fe2[SO4]3+ H2SO4 18.

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BIOLEACHING OF URANIUM PDF europein

PDF This review describes the involvement of different microorganisms for the recovery of uranium from the ore. Mainly Acidithiobacillus forrooxidans. initial work on uranium bioleaching in the early s was taken to prevent oxidation rate of iron that may affect uranium''s microbial leaching.

Microbial Leaching of Uranium Ore ResearchGate

The percolation leaching of a uranium ore in the presence of microorganisms was carried out in semipilot experiments at different scales. microbial activity. The uraniumleaching efficiency

ore leaching bacterial blackbanqueting

Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium ores Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium

Bioleaching: Introduction, Methods, Appliion, Copper

In situ microbial leaching is greater acceptance since it eliminates the expense of moving vast amounts of material. For instance thousand tons of uranium ore must be handled in other than bioleaching processes, to obtain one ton of uranium. This is an indirect leaching process since the microbial attack is not on uranium ore directly but on

Bioleaching Wikipedia

Bioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several appliions within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt

Bioleaching of lowgrade uranium ore using

Bioleaching of uranium was carried out with Turamdih ore sample procured from Uranium Corporation of India Limited, Jaduguda. The bacterial strain that was used in the leaching experiments was isolated from the Jaduguda mine water sample.

Analysis of Uranium Resource Situation and

The present situation,distribution characteristic and known reserve of both the world and China''s uranium resources are reviewed.On this basis,it is pointed out that though China has rich uranium resource,the future demand on uranium can′t be met due to the rapid

(PDF) Microbial Extraction of Uranium from Ores

65 Microbial Extract ion of Uranium from Ore s Parsonsite Pb 2 UO 2 (PO 4 ) 2 ⋅ 2H 2 O 26.1 Zaire Shoep (1923) Pitchblende UO 2 88.1 Many world wide Ring (1980), Agate (1983), Ketzinel

REVIEW Microbial Leaching of Uranium Ore

Vol. 21, No. 8 (2009) Microbial Leaching of Uranium Ore 5809. Harrison et al.9 reported the role of the iron oxidizing Acidithiobacillus ferrooxidans in leaching of uranium. The uranium ore was stacked in heaps, similar to dump leaching of lowgrade copper ore and leached using an acidic ferric sulfate

A comparison of the uranium recovery from lowgrade

A comparison of the uranium recovery from lowgrade ore by bioleaching and acid leaching 137 Uranium ores in Poland contain about 250–1100 mg kg1 U. Soils of Poland contain average amounts of U of 1.6 mg kg1 (lowland) and up to >10 mg kg1 in the mountain soils (Sudety Mountains).

Uranium Bioleaching MINTEK MINTEK

Uraniumbearing ore This reaction requires a source of iron and a high redox potential. In practice, the iron is usually obtained from pyrite – which is either associated with or added to the ore, and a high redox potential is achieved by adding oxidising agents such as pyrolusite (MnO 2

Microbial Leaching of Uranium from Low Grade Ore and

Uranium (U) is one of the strategic elements and essential for many appliions as a fuel in nuclear power plants and nuclear weapons. Microbiological leaching has been used as an alternative approach to conventional hydrometallurgical methods of uranium''s recovery from low grade ores and waste samples Penicillium purpurogenium and Pseudomonas fluorescens SHA 281 were exhibited a good

Bacterial leaching of waste uranium materials.

Uranium leaching is increased up to 20% while sulphuric acid consumption is simultaneously decreased by the addition of pyrite. Uranium concentrations in starting waste materials used for leaching were extremely low (0.0278 and 0.372% U) but about 60% recovery of uranium was obtained, with relatively low consumption of sulphuric acid.

REVIEW Microbial Leaching of Uranium Ore

Vol. 21, No. 8 (2009) Microbial Leaching of Uranium Ore 5809. Harrison et al.9 reported the role of the iron oxidizing Acidithiobacillus ferrooxidans in leaching of uranium. The uranium ore was stacked in heaps, similar to dump leaching of lowgrade copper ore and leached using an acidic ferric sulfate

Microbial Leaching of Uranium from Low Grade Ore and

Microbial Leaching of Uranium from Low Grade Ore and Waste Sample of Northern Part of Gabal Gatter, Egypt Using Penicillium Purpurogenium and Pseudomonas Fluorescens SHA 281 1Shimaa S. Hussien*, Osman A. Desouky1 Said E. Mohamadeyand 1 1Nuclear Materials Authority, P.O. Box 530 ElMaadi, Cairo, Egypt. *Corresponding Author: Shimaa S. Hussien

Acid and ferric sulfate bioleaching of uranium ores: A

Uranium is usually finely disseminated in ore bodies, making leaching the most common process to recover it instead of ore dressing for concentrate production. Many uranium ores processed via bioleaching have contained significant amounts of pyrite and other Fesulfides, which are oxidized to acidic ferric sulfate.

Microbial Leaching of Uranium from Low Grade Ore and

Microbial Leaching of Uranium from Low Grade Ore and Waste Sample of Northern Part of Gabal Gatter, Egypt Using Penicillium Purpurogenium and Pseudomonas Fluorescens SHA 281 1Shimaa S. Hussien*, Osman A. Desouky1 Said E. Mohamadeyand 1 1Nuclear Materials Authority, P.O. Box 530 ElMaadi, Cairo, Egypt. *Corresponding Author: Shimaa S. Hussien

ore leaching bacterial blackbanqueting

Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium ores Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium

recory of uranium from uranium ores casadicurascarnati

Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University, Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium or Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium

microbial mining of ore Opass

Microbial Leaching of Uranium Ore IntechOpen. Sep 9, 2011 roasting of lowgrade ore was conducted at the RioTinto mines. oxidation rate of iron that may affect uranium''''s microbial leaching

8 Microbial Leaching of Metals WileyVCH

4 Principles of Microbial Metal Leaching 194 4.1 Leaching Mechanisms 194 4.2 Models of Leaching Mechanisms 194 4.3 Factors Influencing Bioleaching 197 4.4 Bacterial Attachment on Mineral Surfaces 200 5 Microbial Diversity in Bioleaching Environments 200 6 Case Studies of Bioleaching Appliions 208 6.1 CommercialScale Copper Ore Bioleaching 208

Microbial Leaching of Uranium from Low Grade Ore and

Uranium (U) is one of the strategic elements and essential for many appliions as a fuel in nuclear power plants and nuclear weapons. Microbiological leaching has been used as an alternative approach to conventional hydrometallurgical methods of uranium''s recovery from low grade ores and waste samples Penicillium purpurogenium and Pseudomonas fluorescens SHA 281 were exhibited a good

Bacterial leaching of waste uranium materials.

Uranium leaching is increased up to 20% while sulphuric acid consumption is simultaneously decreased by the addition of pyrite. Uranium concentrations in starting waste materials used for leaching were extremely low (0.0278 and 0.372% U) but about 60% recovery of uranium was obtained, with relatively low consumption of sulphuric acid.

Microbial Leaching of Uranium Ore IntechOpen

Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University, Qaemshahr Branch Iran 1. Introduction This chapter is a review of the microbiological leaching of uranium ores. Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium''s extraction.

Microbial Leaching of Uranium from Low Grade Ore and

Microbial Leaching of Uranium from Low Grade Ore and Waste Sample of Northern Part of Gabal Gatter, Egypt Using Penicillium Purpurogenium and Pseudomonas Fluorescens SHA 281 1Shimaa S. Hussien*, Osman A. Desouky1 Said E. Mohamadeyand 1 1Nuclear Materials Authority, P.O. Box 530 ElMaadi, Cairo, Egypt. *Corresponding Author: Shimaa S. Hussien

Bioleaching Wikipedia

Bioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several appliions within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt

LEACHING IN URANIUM MINE EFFLUENTS, ORE TREATMENT UNIT, CALDAS, MG, BRAZIL Heliana.(A.(F.(Nascimento a*,(M.(B.(Campos,S. Rodgherb,C.V. Roquea

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Bacterial leaching of uranium ore from Figueira—PR, Brazil

199371&ensp·&enspA bacterial leaching program was carried out in order to evaluate the potential of applying this process to leach uranium from the ore of Figueira—PR, Brazil. The experiments were carried out in shake flasks, column percolation (laboratory and scmipilot scale) and in heap leaching.

Bacterial leaching of ores and other materials

The technical setup of uranium ore leaching may be the dump method, but sometimes a variation of this, socalled heap or basin leaching is applied. The ore is set up in basins. The mode of operation is preferably a two stage leaching: the outflowing liquor, in which the iron is largely in the ferrous form, is treated in an oxidation pond.

ore leaching bacterial blackbanqueting

Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University Qaemshahr Branch Iran 1 Introduction This chapter is a review of the microbiological leaching of uranium ores Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium

Bacterial leaching of ores and other materials

The technical setup of uranium ore leaching may be the dump method, but sometimes a variation of this, socalled heap or basin leaching is applied. The ore is set up in basins. The mode of operation is preferably a two stage leaching: the outflowing liquor, in which the iron is largely in the ferrous form, is treated in an oxidation pond.

microrobial mining of uranium animalfarmbb

Recent advances in microbial mining SpringerLink. Microbial Leaching of Uranium Ore 293 waste materials The waste materials low grad e black Schist consisted of 0 05 of uranium and 0 5 to 7 of carbonate Sampling showed the microorganisms aerobic and anaerobic were present till 1 5 to 2 meter of surface depth and more than 99 of Thiobacillus ferrooxidans were present within this depth

A comparison of the uranium recovery from lowgrade

A comparison of the uranium recovery from lowgrade ore by bioleaching and acid leaching 137 Uranium ores in Poland contain about 250–1100 mg kg1 U. Soils of Poland contain average amounts of U of 1.6 mg kg1 (lowland) and up to >10 mg kg1 in the mountain soils (Sudety Mountains).

Bacterial Leaching of a Carbonate Bearing Uranium Ore

Bosecker K., Wirth G. (1980) Bacterial Leaching of a Carbonate Bearing Uranium Ore. In: Biogeochemistry of Ancient and Modern Environments. Springer, Berlin, Heidelberg

Continued Multicolumns Bioleaching for Low Grade Uranium

Bioleaching has lots of advantages compared with traditional heap leaching. In industry, bioleaching of uranium is still facing many problems such as site space, high cost of production, and limited industrial facilities. In this paper, a continued column bioleaching system has been established for leaching a certain uranium ore which contains high fluoride.

microbial mining of ore villacorallina

Microbial Ore Leaching Boundless Microbial ore leaching is the process in which microorganisms are used to extract, is the process of extracting metals from ores with the use of microorganisms, "Steve Altaner, Mineral Resources: Formation, Mining, Environmental Impact More details » Get Price .

Uranium Bioleaching from Low Grade Ore Scientific

The goal of the present work was to perform bioleaching of uranium from low grade ore from Vostok deposit (Republic of Kazakhstan), which was previously subjected to longterm acid leaching. The ore initially contained from 0.15 to 0.20% of uranium in the form of uraninite, but ore samples used in the study contained about 0.05% of uranium, as it was exhausted during acid leaching, and uranium

I. Factors influencing the appliion of bacterial

In the bacterial leaching of Elliot Lake ore, the overall extraction rate that can be obtained is determined mainly by the particle size of the leach feed. On sizes coarser than 4 mesh, where 32 weeks or more is required to reach a uranium extraction of 70%, the extraction rate is related mainly to the rate at which the solutions penetrate the particle to depth.

Uranium Bioleaching MINTEK MINTEK

Uraniumbearing ore This reaction requires a source of iron and a high redox potential. In practice, the iron is usually obtained from pyrite – which is either associated with or added to the ore, and a high redox potential is achieved by adding oxidising agents such as pyrolusite (MnO 2

Bioleaching: Introduction, Methods, Appliion, Copper

In situ microbial leaching is greater acceptance since it eliminates the expense of moving vast amounts of material. For instance thousand tons of uranium ore must be handled in other than bioleaching processes, to obtain one ton of uranium. This is an indirect leaching process since the microbial attack is not on uranium ore directly but on

Uranium leaching is an indirect process When T.ferrooxidants are involved in uranium extraction, they do not directly attack on ore but on the iron oxidants. The pyrite reaction is used for the initial production of Fe Reaction 2FeS+H2O+7 ½[O2] Fe2[SO4]3+ H2SO4 18.

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microbial mining of ore Opass

Microbial Leaching of Uranium Ore IntechOpen. Sep 9, 2011 roasting of lowgrade ore was conducted at the RioTinto mines. oxidation rate of iron that may affect uranium''''s microbial leaching

(PDF) Microbial Extraction of Uranium from Ores

65 Microbial Extract ion of Uranium from Ore s Parsonsite Pb 2 UO 2 (PO 4 ) 2 ⋅ 2H 2 O 26.1 Zaire Shoep (1923) Pitchblende UO 2 88.1 Many world wide Ring (1980), Agate (1983), Ketzinel